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Directional Coupler 2.30-2.60 GHz
DC25-73 Features
s Low Cost s Low Profile s Available in Small SOT-6 Lead Package s Tape & Reel
Description
The DC25-73 is a monolithic directional coupler tailored to the 2.30-2.60 GHz band. It offers low loss, good isolation, good input/output matching and exceptional coupling repeatability. It is available in the SOT-6 lead surface mount package.
Electrical Specifications at 25C
Parameter Frequency Insertion Loss Isolation Input VSWR Output VSWR Coupling Coupled Port VSWR 18.2 30 Min. 2.30 0.2 33 1.1:1 1.1:1 17.2 1.3:1 1.3:1 1.3:1 16.2 1.5:1 dB Typ. Max. 2.60 0.3 Unit GHz dB dB
Pin Out
Block Diagram
Coupled
DC25
GND GND COUPLED
OUT GND IN
Alpha Industries, Inc. [781] 935-5150 * Fax [617] 824-4579 * Email sales@alphaind.com * www.alphaind.com
Specifications subject to change without notice. 3/99A
1 2 3
6 5 4
Out
In
1
Directional Coupler 2.30-2.60 GHz
DC25-73
Typical Performance Data
-0.0 1.5 1.4
Insertion Loss (dB)
-0.1
Output VSWR
2.35 2.40 2.45 2.50 2.55 2.60
-0.2 -0.3 -0.4 -0.5 2.30
1.3 1.2 1.1 1.0 2.30
2.35
2.40
2.45
2.50
2.55
2.60
Frequency (GHz)
Frequency (GHz)
Insertion Loss vs. Frequency
0 1.5
Output VSWR vs. Frequency
Coupled Port VSWR
-10
1.4 1.3 1.2 1.1 1.0 2.30
Isolation (dB)
-20
-30
-40 2.30
2.35
2.40
2.45
2.50
2.55
2.60
2.35
2.40
2.45
2.50
2.55
2.60
Frequency (GHz)
Frequency (GHz)
Isolation vs. Frequency
1.5 1.4
Coupled Port VSWR vs. Frequency
-16 -17
Coupling (dB)
Input VSWR
-18 -19 -20 -21 -22 2.30
1.3 1.2 1.1 1.0 2.30
2.35
2.40
2.45
2.50
2.55
2.60
2.35
2.40
2.45
2.50
2.55
2.60
Frequency (GHz)
Frequency (GHz)
Input VSWR vs. Frequency
Coupling vs. Frequency
2
Alpha Industries, Inc. [781] 935-5150 * Fax [617] 824-4579 * Email sales@alphaind.com * www.alphaind.com
Specifications subject to change without notice. 3/99A
Directional Coupler 2.30-2.60 GHz
DC25-73
Absolute Maximum Ratings
Characteristic Input Power1 Operating Temperature Storage Temperature Value +4.0 W CW -40C to +85C -65C to +150C
SOT-6
0.074 (1.90 mm REF.) PIN 6 PIN 1 INDICATOR PIN 1 0.020 (0.51 mm) 0.014 (0.350 mm) 0.057 (1.45 mm) 0.035 (0.90 mm) 0.126 (3.20 mm) 0.087 (2.20 mm) 0.071 (1.80 mm) 0.052 (1.30 mm)
1. When operating with a 2.0:1 maximum VSWR on all ports.
0.037 (0.95 mm) REF. 0.012 (0.30 mm) TYP. 0.014 (0.26 mm) 0.004 (0.10 mm) 5.0 1
Recommended Board Layout
0.018 TYP.
0.015 TYP.
,,,,,, ,,,,,, ,,,, ,,,, ,,,, ,,,,,, ,,,,,,
0.039 TYP.
,,,,,, ,,,,,, ,,,, ,,,, ,,,, ,,,, ,,,, ,,,,
0.075
0.020
0.006 (0.15 mm) 0.000 (0.00 mm)
5.0 1
DC25
0.122 (3.10 mm) 0.106 (2.70 mm)
0.022 (0.61 mm) 0.004 (0.10 mm)
0.020 DIA. VIA 3 PLACES
Material is 10 mil FR4
Alpha Industries, Inc. [781] 935-5150 * Fax [617] 824-4579 * Email sales@alphaind.com * www.alphaind.com
Specifications subject to change without notice. 3/99A
3

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